Question

3)( 2,5 pontos) Calcule os produtos notáveis.
a) (2x - 3y)²
b) (2x + 3y)²
c) (2x + 3y) (2x - 3y)
d)(2x - 3y)"
e) (2x + 3y)"

Answer 1

Resposta:

a) (2x - 3y)²= 4$x^{2}$ -12x+9$y^{2}$

b) (2x + 3y)² = 4$x^{2}$ +12x+9$y^{2}$

c) (2x + 3y) (2x - 3y)= 4$x^{2}$-6xy+6xy-9$y^{2}$ = 4$x^{2}$-9

d)(2x - 3y)³= $8x^{3} +36x^{2} y+54xy{2} -27y^{3}$

e) (2x + 3y)³= $8x^{3} +36x^{2} y+54xy^{2} +27y^{3}$